Acoustic cover part for a vehicle

a technology for acoustic covers and vehicles, applied in the direction of roofs, machines/engines, manufacturing tools, etc., can solve the problems of not being able to produce a complete noise enclosure, structures for reinforcing or additional functionality, and can only be attached to a limited extent, so as to maintain the stiffness, impact resistance, and elastic modulus properties

Active Publication Date: 2010-07-20
ROECHLING AUTOMOTIVE SE & CO KG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0013]The invention described here is based on the task of creating a cover part for a vehicle, especially for the underbody, cover noise enclosure cover, or wheel well cover that integrates the pr

Problems solved by technology

The maximum component size currently possible is approximately 1.0 to 1.5 m2, due to the very high molding pressures of approximately 200-300 bar and the associated high machine costs for presses with a pressing force of more than 3000 t.
A disadvantage in this method is that structures for reinforcing or required for additional functionality, such as connecting pieces, NACA openings, attachment domes, etc., can be attached only to a limited extent, if at all.
Howe

Method used

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  • Acoustic cover part for a vehicle
  • Acoustic cover part for a vehicle

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Embodiment Construction

[0013]The invention described here is based on the task of creating a cover part for a vehicle, especially for the underbody, cover noise enclosure cover, or wheel well cover that integrates the properties of the systems described above for acoustic and heat insulation while maintaining the stiffness, impact resistance, and elastic modulus properties of the glass fiber-reinforced components.

[0014]According to the invention, the components of glass fiber-reinforced support plates, sound absorbers, heat insulators, nonwoven linings, etc., are no longer separated in their functional arrangement and in their successive production. The properties are combined in a single material or layer arrangement, wherein in a single shaping process an engine compartment cover, an underbody cover, a wheel well, or other inherently stiff components are produced from such a material composite. This results in clear cost reductions compared with most well known multiple-step production methods. Finally,...

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Abstract

A cover part for a vehicle, especially an underbody cover, has a porous core layer and at least one cover layer on each side, wherein the porous core layer is constructed such that it has acoustic transparency or an acoustically absorbent effect. Here, the porous core layer is made either from a thermoplastic matrix with embedded reinforcement fibers, especially glass fibers, whose melting point temperature is higher than the melting point temperature of the plastic matrix, or from a foam, which is either open-cell or closed-cell and perforated. The acoustically absorbent porous core layer is occupied on one or both sides with one or more acoustically transparent or absorbent covering layers.

Description

[0001]This application is a national stage application that claims priority under 35 U.S.C. §§365 and 371 to PCT / EP05 / 11820, filed Nov. 4, 2005, which claims priority to DE 10 2004 053 751.8, filed Nov. 6, 2004.FIELD OF THE INVENTION[0002]The invention relates to a cover part for a vehicle and especially to an engine compartment part or underbody cover part for a motor vehicle, which shall be used as the basis for examples below.BACKGROUND OF THE INVENTION[0003]It is known to form underbody covers or engine compartment covers from glass fiber-reinforced plastics in a forming method with high internal mold pressures. The glass-fiber reinforcement typically consists of woven mats or nonwoven mats, but also from bulk glass fibers, which are, however, as non-oriented as possible and which are introduced into a plastic matrix predominantly of polypropylene. The semifinished products made available in this way are usually plates made from glass fiber-reinforced thermoplastic (GMT) or rod-...

Claims

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Application Information

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IPC IPC(8): F02B77/13E04B1/84E04B1/82F02B77/11E04B1/74
CPCB60R13/083B60R13/0838B60R13/0861B60R13/0876B60R13/0884Y10T442/681
Inventor PFAFFELHUBER, KLAUSORTH, ARNOMOOS, EGONUHL, FRANKHUBER, LUDWIG
Owner ROECHLING AUTOMOTIVE SE & CO KG
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